tested locally

src/Circle.php

@@ -0,0 +1,26 @@
+<?php
+class Circle extends Shape {
+	const SHAPE_TYPE = 3;	
+	protected $radius;
+
+	function __construct($circle_radius){
+		parent::__construct($length = null, $width = null);
+		$this->radius = $circle_radius;
+	}
+
+	function area (){
+		$circle_area = pi() * $this->radius * $this->radius;
+		return $circle_area;
+	}
+
+	public function getFullDescription (){
+		$string = "";
+		$string .= get_class($this)."<#";
+		$string .= $this->getId(). ">: ";
+		$string .= $this->getName(). " - ";
+		$string .= $this->radius;
+
+		return $string;
+	}
+}
+?>

src/Rectangle.php

@@ -0,0 +1,5 @@
+<?php
+class Rectangle extends Shape {
+	const SHAPE_TYPE = 2;	
+}
+?>

src/Shape.php

@@ -0,0 +1,48 @@
+<?php
+class Shape {
+	const SHAPE_TYPE = 1;
+	public $name;
+	protected $length;
+	protected $width;
+	private $id;
+
+	function __construct($shape_length,$shape_width){
+		$this->length = $shape_length;
+		$this->width = $shape_width;
+		$this->id = uniqid();		
+	}
+
+	function getName (){
+		return $this->name;		
+	}
+
+	function setName($new_name){
+		$this->name = $new_name;		
+	}
+
+	function getId() {
+		return $this->id;		
+	}
+	function area (){
+		$shape_area = $this->length * $this->width;
+		return $shape_area;
+	}
+
+	static function getTypeDescription (){
+		return ("Type: ".static::SHAPE_TYPE);
+	}
+
+	public function getFullDescription (){
+		$string = "";
+		$string .= get_class($this)."<#";
+		$string .= $this->getId(). ">: ";
+		$string .= $this->getName(). " - ";
+		$string .= $this->length. " x ";
+		$string .= $this->width;
+
+		return $string;
+	}
+}
+
+
+?>